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'''Mercury(I) hydride''' (systematically named '''hydridomercury(•)''') is an ] with the ] HgH<sup>•</sup>. It is a photosensitive, colourless gas, and is one of the simplest mercury hyrides. '''Mercury(I) hydride''' (systematically named '''hydridomercury(•)''') is an ] with the ] HgH. It is a photosensitive, colourless gas, and is one of the simplest mercury hyrides.


== Chemical properties == == Chemical properties ==

Revision as of 11:10, 14 June 2013

Mercury(I) hydride
Names
IUPAC name Mercury(I) hydride
Other names Dimercurane
Mercurous hydride
Identifiers
3D model (JSmol)
CompTox Dashboard (EPA)
InChI
  • InChI=1S/Hg.HKey: DJSHOLCMNYJYSS-UHFFFAOYSA-N
SMILES
Properties
Chemical formula HgH
Molar mass 201.60 g mol
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Mercury(I) hydride (systematically named hydridomercury(•)) is an inorganic compound with the chemical formula HgH. It is a photosensitive, colourless gas, and is one of the simplest mercury hyrides.

Chemical properties

Mercury(I) hydride is an unstable gas and is the heaviest group 12 monohydride. Furthermore, mercury(I) hydride has a linear (C∞v) structure. By weight percent, the composition of mercury(I) hydride is 0.50% hydrogen and 99.50% mercury. In mercury(I) hydride, the formal oxidation states of hydrogen and mercury are −1 and +1, respectively, because of the electronegativity of mercury is lower than that of hydrogen. The stability of metal hydrides with the formula MH (M = Zn-Hg) increases as the atomic number of M increases.

The Hg-H bond is very weak and therefore the compound has only been matrix isolated at temperatures up to 6 K. The dihydride, HgH2, has also been detected this way.

A related compound is dihydrido-1κH,2κH-dimercury with the formula Hg
2H
2.

References

  1. "Mercury hydride". Chemistry WebBook. USA: National Institute of Standards and Technology. Retrieved 14 October 2012.
  2. Aldridge, Simon; Downs, Anthony J. (2001). "Hydrides of the Main-Group Metals: New Variations on an Old Theme". Chemical Reviews. 101 (11): 3305–65. doi:10.1021/cr960151d. PMID 11840988.
  3. Knight, Lon B. (1971). "Hyperfine Interaction, Chemical Bonding, and Isotope Effect in ZnH, CdH, and HgH Molecules". The Journal of Chemical Physics. 55 (5): 2061. doi:10.1063/1.1676373.
Mercury compounds
Mercury(I)
Mercury(II)
Organomercury
compounds
Mercury(IV)
Amalgams
Mercury cations
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